Net Refrigeration Effect Calculator

Formula

The formula to calculate Net Refrigeration Effect (NRE) is:

\[ \text{NRE} = h_v - h_l \]

Where:

\( \text{NRE} \) is the net refrigeration effect (kJ/kg)
\( h_v \) is the enthalpy of vapor at the outlet (kJ/kg)
\( h_l \) is the enthalpy of liquid at the inlet (kJ/kg)

What is the Net Refrigeration Effect?

The net refrigeration effect is a measure of the cooling capacity of a refrigeration system. It represents the amount of heat removed from the refrigerated space per unit mass of refrigerant. This value is crucial for understanding the efficiency and performance of refrigeration systems, as it directly impacts the amount of cooling provided. The net refrigeration effect is determined by the difference in enthalpy between the vapor at the outlet and the liquid at the inlet of the evaporator. A higher net refrigeration effect indicates a more efficient refrigeration cycle, leading to better cooling performance.

Example Calculation

Let's assume the following values:

Enthalpy of Vapor at the Outlet (h_v) = 250 kJ/kg
Enthalpy of Liquid at the Inlet (h_l) = 100 kJ/kg

Using the formula to calculate Net Refrigeration Effect:

\[ \text{NRE} = 250 - 100 = 150 \text{ kJ/kg} \]

The Net Refrigeration Effect (NRE) is 150 kJ/kg.